Improvement in mechanisms for operating the harness of looms



UNITED STATES PATENT OFFICEc VILLIAM It. ANDREWS, OF MYSTIO RIVER,CONNECTICUT.

IMPROVEMENT IN MECHANISMS FOR OPERATING THE HARNESS 0F LOOMS.

Specilication forming part of Letters Patent No. 58,968, dated October23, 1566.

To all whom it may concern s Be it known that I, TVILLIAM R. ANDREWS, ofMystic River, in the county of New London and State of Connecticut, haveinvented anew and useful Mechanism for Operating the Harness of a FancyLoom; and I do hereby declare the same to be fnlly described in thefollowing speciiication, and represented in the accompanying drawings,of which- Figure 1 is a top view, Fig. 2 an end elevation, and Fig. 3 atransverse and vertical section, of a loom-frame with my inventionapplied thereto.

In such drawings, A denotes the said frame without either the lay ortheharuesses usually applied to it.

B is the lay-shaft, and (l is a frame for snp porting the mechanism foractuating each harness, such frame being applied to one end of theloom-frame A.

Within the frame C there is arranged, in manner as represented, two ormore tri-armed levers, D D, their common fulcruin heilig a rod, a, goingthrough and supported by the said frame U.

The lifting and lowering cords of each harness, after being passed aboutcertain proper guides or wheels, are to be attached to the two longerarms of one of the tri'armed levers, the same being so as to cause theharness to be raised by the movementof the lever in one direction, andto be depressed byits movements in the opposite direction.

The shorter arm, b, of each of the said levers D extends between twocams, E F, which are arranged upon, and so as to be capable of beingrevolved on, two stationary rods or shafts, c d.

To the side of each cam, and so as to be concentric with the camshaft, agear, e, is fixed, which is designed to revolve the cam by engagin gwith two vertical racks, G H, arranged as represented in Fig. 3. Thereis thus combined with each triarmed lever two cams and two racks. One ofthese racks has a notch, f, arranged in it, as shown in Fig. 3, theother being without any such notch.

There is also applied to the frame C, and so as to extend down from itin the plane of the two racks, a spring, I, there being such a springfor each pair of racks. A pattern-prism, 1c,

and chain, K, such as is common to fancy looms,

are arranged with respect to such springs, as represented in thedrawings.

The next part ot' the mechanism to be described is what may be tcrmedtherack-elevating mechanism. A jack or hooked arm, K, turning freely on arod, h, supported by two arms, t i, extending from a rockershaft, k,extends up through a slot, l, madein the bottom piece m of the frame C,and is arranged inthe plane of the two racks andthe spring thereof.

Aconnectingrod, n, projecting upward from and -jointed to a joint-piece,o, is applied to a crank, p, affixed upon the lay-shaft B, the saidjoint-piece being jointed to one of the arms During each revolution ofthe layshaft a reciprocating vertical motion will be imparted to the twoarms i i and their rod h, whereby the several jacks K' will be elevatedand depressed simultaneously.

The mechanism for revolving the patternprism may be thus explained Onone end of the arbor of such prism is iixed a ratchet, q, against theinner side of which a friction-brake or spring, r, bears, such springbein g fastened to the frame (l. An impellin g or hooked drawpawl, s,jointed to a lever, t, engages with the ratchet, such lever beingconnected with the rod h by means of a connecting-rod, u, the wholebeing as represented.

During the movement ofthe pattern-chain, its projections will operateagainst the series of springs I I in the order necessary for theformation ofthe figure to be woven, the operation being to force eachspring inward at the proper time or times, so as to insure it to pressits jack inward, in order that during the upward movement of such jackit (the jack) may engage with the inner of the two racks and force itupward. While such rack may bc rising the fellow rack will becorrespondingly going downward, and the cams will be workedsimultaneously, in which case the lower one of them will raise the armZi of the lever D, the other cam revolving, so as to permit suchelevation of the arm to take place. This n1ovement of the arln willcanse the tri-armed lever to be moved so as to move its harness in onedirection.

As soon as the pin of the pattern-chain may have ceased to press uponthe spring by which the aforesaid jack was moved inward, such jack willbe freed from the pressure of the lla spring, and Wilt be thrown buck bythe action otgruvity and out of connection with the rack, so as not topull it downward.

rlhe two cams will then hold the tri-armed lever rigidly in its positionuntil the next elevation of thejack, which taking place, the jack willhe forced up against the outer of the two racks and force it upward, andthus effect movements of the czuns such as will move the triurmed leverin a direction opposite to that in which it was previously moved.

To insure the discharge ot'eflch ofthe hooked jacks from the notch ofthe rack during an ascent of the jack m1d1ack,eech jack has zt com, fr,fixed to it to uct against the end oi the slot, l.

The above-described invention is very effective und positive in itsoperation.

I claim- The above-specified new and useful harnessoperating mechanismor combination, consisting of the trimmed lever D, the two cams E F, thegears e e, and racks G H, the spring 1, and the rack-elevatingmechanism, the whole heilig arranged together, and with t patternchainand its actuating mechanism, substantially in manner and so as tooperate as expluined.

WM. R. ANDREWS.

Witnesses F. P. HALE, J r., 1t. Il. EDDY.

